The 23rd Infantry Brigade was an infantry brigade of the British Army that saw active service in the First World War, mainly on the Western Front During the Second World War, the brigade saw active service in the Syria-Lebanon Campaign, the Western Desert Campaign, and the Burma Campaign.
The 1st Armoured Infantry Brigade was an infantry brigade of the British Army with a long history including service during both the First and the Second World Wars. It was based at Tidworth Camp. Previously, it has been designated 1st (Guards) Brigade, 1st Infantry Brigade, 1st Mechanised Brigade, and under the initial Army 2020 reforms assumed the title of 1st Armoured Infantry Brigade. Under the Future Soldier programme, the brigade merged with the 1st Artillery Brigade to form the 1st Deep Recce Strike Brigade Combat Team.
The 20th Independent Infantry Brigade was an infantry brigade of the British Army, raised during the Second World War.
The 24th Infantry Brigade was an infantry brigade of the British Army from the First World War. It was reraised during the Second World War, as the 24th Infantry Brigade (Guards). During various designations, the brigade was active throughout the Cold War and existed until 1999, when it was merged with the 5 Airborne Brigade to become 16 Air Assault Brigade.
The 25th Army Tank Brigade was an armoured brigade formation of the British Army that was active before and during the Second World War. It served with the British First Army and the British Eighth Army during the battles in North Africa and Italy.
The 23rd Armoured Brigade, originally formed as the 23rd Army Tank Brigade, was an armoured brigade of the British Army that saw service during the Second World War. The brigade was a 2nd Line Territorial Army (TA) formation. It was reorganised and renamed the 23rd Armoured Brigade, when it was assigned to the 8th Armoured Division, although it never operated under command of the division.
The 131st Infantry Brigade, originally the Surrey Brigade was an infantry formation of Britain's Territorial Army that saw service during both the First and the Second World Wars. In the First World War the brigade was in British India for most of the war and did not see service as a complete unit but many of its battalions would see service in the Middle East.
The 11th Security Force Assistance Brigade is a brigade of the British Army which is intended to train and assist foreign forces. In 2021, under the Future Army changes, the brigade was redesignated, formerly being the 11th Infantry Brigade & HQ South East. Prior to the Army 2020 changes in 2013, the brigade was temporarily activated for deployment to Afghanistan. Originally formed in the Second Boer War, the brigade was engaged during both World Wars.
The 12th Armoured Brigade Combat Team, formerly the 12th Armoured Infantry Brigade, is a regular brigade of the British Army which has been in almost continuous existence since 1899 and now forms part of 3rd Division.
The 1st Armoured Brigade, raised as the 1st Light Armoured, on 14 April 1940 its designation changed to 1st Armoured Brigade Group, an armoured formation of the British Army.
The 3rd Infantry Brigade was a Regular Army infantry brigade of the British Army, part of the 1st Infantry Division. Originally formed in 1809, during the Peninsular War, the brigade had a long history, seeing action in the Second Anglo-Afghan War, and during both the First and the Second World Wars.
The 29th Infantry Brigade was an infantry brigade unit of the British Army. It was originally raised in 1914 and saw service during the First and Second World Wars and the Korean War.
The 145th Infantry Brigade was a regional brigade of the British Army that saw active service in both the First and the Second World Wars, disbanding in 1943 and being reformed in the 1990s. The Brigade was renamed Headquarters 11th Infantry Brigade and Headquarters South East in October 2014.
The 6th Infantry Brigade was a regular infantry brigade of the British Army that was in existence during the Second Boer War, the First World War and the Second World War and later formed part of British Army of the Rhine.
The 7th Support Group was a supporting formation within the British 7th Armoured Division, active during the Second World War's Western Desert Campaign.
The 159th Infantry Brigade was an infantry brigade of the British Army. Part of the Territorial Army (TA), the brigade was assigned to the 53rd (Welsh) Infantry Division and served with the division in the early stages of the Second World War until May 1942 when it was transferred to be the motorised infantry element of the 11th Armoured Division. The brigade would serve with the 11th Armoured in North-west Europe from June 1944 to May 1945.
The Lothians and Border Horse was a Yeomanry regiment, part of the British Territorial Army. It was ranked 36th in the Yeomanry order of precedence and was based in the Scottish Lowland area, recruiting in the Lothians – East Lothian (Haddingtonshire), Midlothian (Edinburghshire), and West Lothian (Linlithgowshire) – and along the border with England, particularly Berwickshire. It amalgamated with the Lanarkshire Yeomanry and the Queen's Own Royal Glasgow Yeomanry to form the Queen's Own Lowland Yeomanry in 1956.
The 158th Infantry Brigade was an infantry brigade of the British Army that served in both the First and Second World Wars, before being disbanded in 1968. Throughout its existence the brigade was assigned to the 53rd (Welsh) Infantry Division and was composed almost entirely of Territorial battalions from the Royal Welch Fusiliers.
The 31st Armoured Brigade was an armoured brigade formation of the British Army, created during the Second World War.
The 20th Light Armoured Brigade, later 20th Armoured Brigade was an armoured formation of the British Army which was formed on 3 September 1939. The brigade was disbanded in 1943 and its successor, the 20th Armoured Brigade was formed in 1950, but was a regular formation and not a Territorial Army formation.
United Kingdom 
British Army 
